Wrapping or unwrapping machine



June 19, 1928.

J. DERRY WRAPPING OR UNWRAPPING MACHINE 19, 1926 3 Sheets-Sheet June 19, 1928.

J. DERRY WRAPPING OR UNWRAPPING MACHINE June 19, 1928. 4

J. DERRY WRAPPING OR UNWRAPPING MACHINE v e N m E P ta N: T I

3 Shee Filed March 19, 1926 Patented June 19, 1928.

name sarss m ill Fit-T.

JASPER DERBY, OF MEDFORD, MASSACHUSETTS, ASS-IGNOR TO ANDREW TERKE LSEI T, 01E BOSTON, MASSACHUSETTS- WRAPPING on unwnarrnve MACHINE.

Application filed March 19, 1926. Serial No. 96,063.

This invention relates to a wrapping or unwrapping machine, the inventionbeing adapted to be applied to a machine whereby spirally wound strips of niaterial, such as cloth strips, .may be unwound from pipe,

bars, or other articles, and rewound on a roll or spool. The invention is also adapted foruse, in machines for unwinding a strip from a roll. and wrapping it in helical 0r spiral windings on a cylindrical or annular object.

An objectof the invention is to provide an improved machine capable of accomplishing the foregoing purposes in which improved means is providedfor supporting the work or article to be wrapped or unwrapped, said means being movable oradjus. able upon varying the angle of lead of the wrapping strip relatively to the work. In the present instance this supporting means is in the form of rotatable disks orrolls which not only act as supporting means for t ea'rticle,

but also act to feed the article or'work'longitudinally during the wrapping or unwrapping thereof. 'According to the present invention the supporting disks are mounted so. as to permit them to'be adjustedin different angularly related planes in accord ance with different angles or inclinations at which the strip is lead to or from the article or work. The mounting of the supporting and feeding disks is such as to permit them to be automatically moved into different an-v gularly'related planes to compensate'for variations in the angle or inclination of lead of the strip. Where, for instance, the invention is used for unwinding a strip from the work, the strip will be unwound evenly as a result of this invention and may be wound on a suitable roll or support-evenly and smoothly.

Av further object of this invention is to provide mechanism adapted either for anism for winding the strip after being urn wrapped from the article, and alsotlie pro,-

vision of improved'means for controlling t'he speed at which the strip'is wound.

Other olnects of this inventionwill' appear in the following description and appendedclaims reference being had to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in"v the views.

Fig. 1 is a plan view partly brokenaw-ay showing a machineembodying my invention;

Fig. 2 is a side elevation of the construction shown in Fig. 1. v

Fig. 3 is a detail side elevation showing the mechanism for supporting and feeding the work.

Fig. 4 is a fragmentary end view of the construction shown in Fig.3. 1 Fig. 5 is a sectional plan view taken substantially on'lines 5-5 of Fig 3. v Fig. 6 is a fragmentary side elevation illustrating the supporting rollsor disks" and the driving means therefor when the machine is utilized for wrappingpurposes.

"Beforeexplaining in detail the present improvement and mode of operation thereof.

I desire to-have it- 'understood that the in vention is not limited to-thedetails of con struction and arrangement of parts which are illustrated inthe accompanying -dr-aw-, ings, since the inventionis capable of other embodiments, and that the phraseology which I employ is for the purpose ofde-' scription and notof limitation.

The present machine as illustrated in't he drawings is especially adapted for the purpose of wrapping or unwrapping articles such as pipe, bars, etc., but it will be understood that the parts of the machine may be arranged or designed so as to be adapt'edfor use in connection with the wrapping or-"unrapping of other types of articles such as annular objects. Heretofore, in. order" to wrap cloth strips from pipe, the's'trip being spirally'wound on the pipe, it was'ne'ce'ssary toaccomplish l his by hand,.and it was found exceedingly diflicult to rewind the cloth strip on a support or rolltopreventth'e strip from becoming wrinkledor creased around the several win-dingson'the roll., Another serious difiiculty encountered in unwrapping the'clo-th strip from the pipe resulted from the fact that-the angle of h nation the windings of the strip on the pipe are not uniform, and it was therefore impossible to automatically unwind the strip and rewind it smoothly and evenly on a support, due largely to the fact that the angle of lead of the strip varied constantly. The foregoing disadvantages are overcome by my invention, and I have provided mechanism by which the strip may be automatically unwound from the pipe or other article irrespective of variations in the angle of lead of the strip, and in which the strip may be wrapped smoothly on a support or roll without wrinkles or creases being formed in the several windings of the strip on the support or roll.

The machine in thepresent instance is provided with a suitable base or frame 18 carrying the mechanism. Extending from the base is a post or upright 19, and securely fitted within a bore. In the upper end of this post is a vertically extending shaft 20. A bushing 21- surrounds the upper end of the shaft, and freely mounted thereon is a sleeve22 of a swinging bracket22. A ball bearing 23 is interposed between the sleeve 22 and the shaft 20', and mounted on the upper end of the shaft is a ball bearing cap 24 secured in place by means ofa screw on the bushing 21 of shaft 20 is a sleeve 31.

This sleeve is tapped at 32 to receive the threaded end of the shank or rod 32 of a handle lever 32. Secured to the upper face of the sleeve 31 is a plate 33 which extends above and parallel to the rod 32, and terminates in a downwardly bent or offset portion 33 having a bore through-which extends the rod 32. A swinging lever 34 is fulcrumed .at 35 on the upper face of the plate The longer arm of the lever 34 extends rearwardly a suitable distance and is connected at its end to a vertically extending post 36, the latter being secured to the outer end of the swinging bracket 22. The shorter arm of the lever 34 at the opposite sideof the fulcrum 35 is connected at 38 to one end of a tension spring 37, the opposite end of ,the spring being connected at 39 to the plate 33 near the turning axis of the sleeve 31.

The tapped hole 32 into which the forward end of the lever132 is threaded extends through the sleeve 31, so that by turning the handle 32 far enough the forward end of the rod or lever 32 will act as a set screw and bind the sleeve 31 in fixed and adjusted position on the fixed bushing 21 of the shaft 20.

From the foregoing it will be seen that upon turning the handle 32 so as to loosen the sleeve 31, the latter may then be turned or rotated to the desired position about the shaft 20. Thereupon the sleeve 31 may be secured in thisadjusted position. spring 37 acts to yieldingly maintain the lever 34 in alinement with the points 35 and 39, and hence when the handle 32 is swung laterally from the position shown in Fig. 5 thereby rotating the sleeve 31, the action of the spring 37 will be to urge the lever 35 into alinement with the handle lever 32, thus swinging the arm 22 which carries the disks 28 and 29. I

In the present'instance where the strip is to be unwrapped from an. elongated ar tiele, such as the pipe WV, a series of spaced supports are provided for the work. The

machine may be provided therefore with a plurality of pairs of disks 28 and 29, 28 and 29, etc., two pairs or sets being shown by way of example in Fig. 1, and the work is therefore supported at spaced intervals along its length. The supporting arms 22 for the several pairs of disks 28 and 29, 28 and 29, etc., are connected together for simultaneous swinging movement by means of a longitudinally extending connecting rod 40 which extends through the posts 36 of each supporting unit. From this construc- The tion it will be seen that the supports for the several sets of disks will have a common swinging movement and all may be simultaneously adjusted by means of a single controlling mechanism, shown in Fig. 3, which may be carried by one of the sets only.

Where the machine is used for unwrap-- ping purposes the article XV which is spirally wrapped with a strip S is placed in position upon the several pairs of supporting disks 28, 29, 28 and 29 as shown in Fig. 1. The strip S is led from the work over the curved edge 100 of a guide 101 (see Fig. 1) and thence is carried through a receptacle 64 containing water for moistening the cloth strip. The strip passes under a guide 65 and over a similar guide 66 car ried by a supporting bracket 7 2, and thence the stripis guided to the stud or roller 52 by means of guides 67, 68, 69 and 70. As

hereinafter described the roller 52 is rotated for winding the-strip thereon.

. The winding mechanism is driven from a suitable motor 41 mounted on the base 18 ofthe machine. A drivingshaft 42 is operated from the motor and is provided with a longitudinal keyway 43, the, drive shaft being supported at its outer end within suitable bearings in a bracket 44. 'Slidne /4 ers ingly mounted on'the shaft 42 and having a key fitting into the keyway 43' is a driving disk 45-which is adapted to frictionally engage the face of a driven disk 46 having a hub 47 keyedto a cross shaft 47. [Acom pression spring 48is interposed between the hub or sleeve 47 and a collar 49 on the cross shaft so that the driven disk" 46 is urged by means of the spring into engage ment with the driving disk 45. At the opposits end of the cross shaft 47 is mounted a gear 50 meshing with a larger gear 51 on a stud shaft 76, this shaft carrying at one side ofthe gears 50 and 51 a guard plate or disk 7 5, and also carrying the stud or roller 52 upon which the strip is wound.

Mechanism is provided for disengaging the driving and driven disks 45 and 46 and Jill at the same time for applying a braking action tothe driven disk 46. As shown in Fig. .1' a brake shoe 53.is mounted at one face of the driven disk 46. this shoe carrying a projecting pin 54, which is housed in a slot in the end of a pivoted cam lever 55 which is swung by means of a handle 56. It will be understood when the lever 56 is swung into theposition shown in Fig. 1 the 46 will be forced into driving engagement with the disk45 byme'ans of the spring 48. Upon swinging the handle 56 in the oppo site direction the brake shoe 53 will beforced into engagement with the disk 46 resulting in moving the disk against the action of spring 48 away from the driving disk 45;thus at the same time disconnecting the driving disk and applying a-fbra-king action to the driven disk; Swinging movement of the handle lever 56 may be limited by means of ,anarm 57 adaptedto engage stops 58 and 59 carried by the frame.

In the present machine the speed of rotat-ion of the stud. 52 is automatically controlled in accordance'with the diameterof the roll R comprising the several windings of the strip. It will be understood that as the strip is wound on the roller152 the diameter of the roll R increases,. and as the diameter or size of the roll increases it isdesirable to decrease the speed of rotation of shaft 76. In the presentqinstance this is accomplished by means of a speed-control lever 63 having a part 63? adapted to con- ,stantlv engage the peripheral face .of the roll R .(see Fig. 2). The lever 63 at its lower end is secured to one end of a rock shaft 62 and at the opposite end of this shaft is mounted a lever 61. The upperv end of the lever 61 is bifurcatedto, provide a fork which fits into, grooved spool 60 secured to the driving disk '45. From the foregoing it will be seen that as the diameter of the roll It increases the control lever 63. will'be swung outwardly,- thereby rocking the shaft 62.,- swinging the level? 61' inthe same direction, and shifting the driv- From the foregoing it will be see'nf'that the work NV is rotatablycarried'by supporting means which is free-to move into various positions. Before commencing-the unwrapping operation the several sheets, or pairs or disks 28 and 29 are positioned at an angle corresponding approximately to the angle of inclinaton of the strip S as it is led off from the work This approximate positioning or adjustment of the supporting-"and feeding rolls 28 and 29 is aceomplished'as previously described through the handle lever 32. The strip is then threaded through or over the various guides to'the stud or roller52. The machine is started" by swinging the lever 56 into position as shown in Fig. 1. As the'stripis spirally unwound from the work W the latter will be fed lengthwise by means of the disks 28 and 29. These disks will'automatically assume a. position in which the planes ofthe disks will extend parallel to-the angle of in clinat-ion of the strip as it is ledoff from the work, or'in other words the angle of lead of the strip will determine the angle or ineli nation of the supporting and feedingdisks.

Since these disks are mounted so that they v will be sensitive to veryslightpressure, any variation inthe angle of lead' or the strip on the work during the: unwrapping opera tion will result inwcausing thework to swin'g the disks into proper angle, and againstthe yielding action of the spring 37.

' The feeding disks are initially adjusted at the approximate angle orinc'lin'ation of-lead of the strip, and in practice due to the'v'ariations in this lead, it is found that the disks will oscillate horizontally back and forth against the-action of? spring 37 in order to compensate for the varying leads. Asa result. of this construction the strip will be unwound evenly from the work-"and by meansxof the various guidesthe strip will be conducted'without wrinkles to *the- "support 52 and will be wound thereon evenly and snioothly.- l

3V here the machineflis utilized for -unwinding the strip from the roll-R andwrapping and cross belts 7 9: and 81 The belt wheel 77 is provided with a hub77 mounte'dona cross shaft 7 8 which iss'uitably' drivenfrom the driving shaft 42. I

It is'to be understood that by describing in detail herein any particular fornn structure, or arrangement, it is not intended to limit .the invention beyond the terms of the several claims or the requirements of the prior art. L

What I claim is: 7

-1. In a machine for wrappingor unwrapping helical windings of a wrapping strip, the combination of supporting means for the article to be wrapped or unwrapped, guide means for permitting the strip to be led to or from the article at different inclinations or angles, and means for movably mounting said supporting meansto permit movement thereof a";- the angular lead of the wrapping-strip varies.

2.' In a machine for wrapping or unwrapping helical windings of a strip, the combination. of supporting means for the article to be wrapped or unwrapped, guide means for permitting the strip to be led to or from the article,and means for permitting said supporting meansto swing as the angular lead of the strip varies.

3. In a machinefor wrapping or unwrap ping helical windings. of a strip,- the combination of supporting'means for the article to be wrapped or unwrapped comprising rollers peripherally engaging the article, and means for permitting said rollers to swing to compensate for variations in the angle of I lead of the strip.

4. In a. machine for wrapping or unwrapping spiral windings of a strip, the combination of supporting rollers or disks having the peripheries thereofengaging tl e article to be wrapped or unwrapped, guide means for permitting thestrip to be led at different inclinations to or from said article, and means for adjusting the position of said rollers to accommodate variations in the angle oflead of the strip. p v

5.. In-a mach'ne for wrapping orunwrapping spiral windings of astrip, the combination. of supporting rollers or disks having the peripheriesthereof engaging the article toibe wrapped or unwrapped, guide means for permitting the strip to be led at different inclinations to or from, said article, and means for varyingthe position ofsaid rollers to cause the same to automatically as sl me an angular position substantially corresponding to the angle of lead of the-strip. 6. In a machine for wrapping'or unwraping spiral windings of a strip,,the combination of supporting means for the article to be wrapped or unwrapped including a. roller or; disk having the periphery thereof engaging the article, guide means forthe strip,

meansfor adjusting said roller into angular position approximating the angle of lead of the 1 strip, and means for permitting the roller to yield to conform to the exact angle of lead of the strip.

7-. In; a machine for wrapping or unwrappingspiral windings of a strip, the combination of supporting means including a roller or disk having the periphery-thereof e-ngaging the article tozbe wrapped or un-v wrapped, guide means for the strip, and means supporting said roller permitting swinging thereof to compensate for varia tions in the angle of lead of the strip. V

S. In a machine for wrapping or unwrapping spiral windings of a strip, the combina tion of supporting rollers or disks having the peripheries thereof engaging the article to be wrapped or unwrapped, guide means for permi ting th'e strip to be led atdifl'er'ent inclinations to or from saidnrticle, means for supporting said rollers to permit them to swing into different angularly related planes, and means for yieldingly adjusting the rollers in any of said angular planes.

9..In a i'nachine of the class described.

the combination of a plurality'of*pairs of rotatable disks, the disks of each pair overlapping to support therebetween the article, and means for 'swingingly supporting said disks to permit the same to freely swing by the tension of the strip being wrapped or unwrapped. V i

10. In a machine of the class described, the comhination'of a plurality of pairs of rotatable disks, the disks of each pair being positioned to support'therebetween the article, and means for movably mounting said disks to-permit movement thereof to accom-' modate different angular leads of the strip. 11. In a machine of the class described, the combination of a plurality of pairs of rotatable disks, the disks of each pair being positioned to support. therebetween the article, and means forswingingly supporting the disks to permit movement thereof into angular lanes corresponding to different angles of lead of the strip.

12. In a machine of the class described, the combination of rotatable members for supporting on the peripheries thereof the article to be wrapped or unwrapped, and means for supporting said members to permit sw'inging movement thereof in different planes in accordance with diflerentangles oflead of the strip'with relation to thea1 ticle.

' of lead, and means for adjustingsaiddisks 13. Ina machine of theelassdescribed,

angularly to correspond to the angle of. lead disks relatively to said support, and yielding means connecting said member with said adjusting means to permit restricted yielding movement of the disks.

16. In a machine of the class described, the combination of a plurality of sets 01'' rotatable disks for supporting the article to be unwrapped, a rotatable support for winding in a roll the strip as it is unwrapped from the article, means for rotating said support, means for automatically controlling the speed of rotation thereof, in accordance with the diameter of the roll, and means for permitting movement of said sup porting disks in accordance with the various angles of lead of the strip,

17. In a machine of the class described, the combination of supporting means for the article including a disk peripherally engaging the article, means for angularly leading a wrapping strip to or from said article, and movable means for supporting said disk and sensitive to angular variations in the strain exerted by the strip on the article.

18. In a machine of the class described the combination of supporting means for the article including a disk peripherally engaging the article, means for angularly leading a wrapping strip to or from said article, movable means for supporting said disk, and sensitive to angular variations in the strain exerted by the strip on the article, and means for driving said disk.

19. In a machine of the class described the combination of spaced pairs of rotatable disks located in the same horizontal plane and the disks of each pair overlappingto support therebetween the article to be wrapped or unwrapped, means for angularly adjusting said disks in a horizontal plane, and means for guiding'a wrapping strip relatively to the article.

20. In a machine of the class described the combination of spaced pairs of rotatable disks located in the same horizontal plane and the disks of each pair overlapping to support therebetween the article to be wrapped or unwrapped, means for angularly and sin'iultaneously adjusting said disks in a horizontal plane, and mean; for guiding a wrapping strip relatively to the article.

21. In a machine of the class described the and the disks of each pair overlapping to support therebetween the article to be wrapped or unwrapped, means for adjusting said disks horizontally to cause all the disks to extend at a predetermined angle, means for permitting yielding movement of the disks irrespective of said angular adjustment, and means for guiding a wrapping strip relatively to the article.

In a machine of the class described, the combination of spaced pairs of rotatable disks located in the same horizontal plane and the disks of each pair overlapping to support therebetween the article to be wrapped or unwrapped, and means for supporting said disks to permit them to swing as the angular lead of the wrapping strip varies.

23. In a machine of the class described the combination of means for supporting the article, a roll adapted to carry a wound strip, means between said roll and article for guiding the strip, driving mechanism for rotating said roll, means for disconnecting said driving mechanism and applying a brake action thereto, and means for permitting angular adjustment of said supporting means.

24. In a machine of the class described the combination of means for supporting the article, including. a rotatable disk, a roll adapted to carry a wound strip, means between said. roll and article for guiding the strip, driving mechanism for rotating said roll, means for disconnecting said driving mechanism and applying a brake action thereto, means for permitting angular adjustment of said disk, and means for driving said disk. 1

25. In a machine of the class described the combination of means for supporting the article with a wrapping strip spirally wound thereon, said means including a disk. peripherally engaging the article, a roll adapted to wind up the wrapping strip, means for guiding-the strip from the article to said roll, means for driving said roll, and means engaging the periphery of the roll and cooperating with said driving means for controlling the speed of. rotation of the roll.

26. In a machine of the class described the combination of means for supporting the article with a wrapping strip spirally wound thereon, said means including a disk peripherally engaging the article, a roll adapted to wind up the wrapping strip, means for guiding the strip from the article to said roll, means for driving said roll, means engaging the periphery of the roll and cooperating with said driving means for controlling the speed of rotation of the roll, and angularly' movable means for supporting said disk.

In testimony whereof I affix my signature.

JASPER DERBY. 

